Improvement in steam vacuum-pumps



UNITED STATES PATENT OFFICE.

IMPROVEMENT IN STI-EAM VACUUMPUMPS.

Specification forming part of Letters Patent No. 126,898, dated May 21,1872.

SPECIFICATION.

Beit known that I, JAMEsM. MoEEHEAn, ofthe city of Brooklyn, county ofKings, State of New York, have invented an Improvement in SteamVacuum-Pumps; and do hereby declare that the iollowing description,taken in connection with the accompanying drawing hereinafter referredto, forms aA full specitication of the same.

My invention consists in making steam-pumps with a metallic diaphragmattached to a rod extending through the center of the cylinder of thepump. This diaphragm is composed of' two metallic plates or disks, madeso as to allow a small space or chamber between them. They are thensoldered or bra-Zed together at their outside edges, the space orchamber being filled with water or other expansive fluid andhermetically sealed. In the upper part of the cylinder, and attached tothe top ofthe rod, is a valve, which operates so as to 'close thesteam-port in top of cylinder. In connection with the metallic diaphragmis another diaphragm at the bottom end of the cylinder, and attached tothe said rod, and operated by atmospheric pressure connected with thecylinder, is a discharge-pipe and a suction-pipe; also, an open tube forholding water, and an injection-pipe. In the accompanying drawing, whichillustrates my invention and forms a part of the specilication thereof,Vin which corresponding parts are illustrated by similar letters- Figurelis a side view of my improved steam Vacuum-pump. Fig. 2 is a sectionalView of the same. Fig. 3 is a detail View, showing my improvement.

In the drawing, A is the cylinder; B, the metallic diaphragm; G, the rodwhich extends through the cylinder A; E, the .valve that is attached torod C; D, the atmospheric dia.- phragm; F, the discharge-pipe; H, thesuction-pipe; I, the open tube for holding water; K, the injection-pipe;L, the steam-port. l 'The operation of my improved steam vacuum-pump isas follows: The cylinder A being 'filled with water, the steam entersthe steamport L and passes into the cylinder A, which forces the waterout at the discharge-pipe F, and, coming in contact with the metallicdiaphragm B, heats the fluid contained in the chamber or space betweenthe plates or disks composing the diaphragm B, which, by its expansion,raises the rod O, 4carrying with it the valve E and closing thesteam-port L, (see Fig. 2,) thereby forming a partial vacuum. The waterin the open tube I is then forced, by atmospheric pressure through thesmall injection-pipe K, in jets into the cylinder A, thus forming acomplete vacuum. The lower diaphragm D now being acted upon byatmospheric pressure rises up and holds the valve E tightly in its placeuntil the cylinder A is again filled with water through the suctionpipeH.

I claim as my invention- In a steam vacuum-pump, the combination of themetallic diaphragm B, composed of two plates or disks, with its chamberor space iilled with any expansive duid, the rod U, atmosphericdiaphragm D, and valve E, all constructed, arranged, and operatingsubstantially as herein described and shown.

In testimony that I claim the foregoing I haveliereunto set my hand andaffixed my seal this 4th day of March, A. D. 1872.

JAMES M. MOREHEAI).

In presence ot;-

LoUrs W. FROST,

CHARLES G. COE.

